package chapter_2;

public class Test20 {
    public static void main(String[] args) {
        System.out.println(f(1));
        System.out.println(f(2));
        System.out.println(f(3));
        System.out.println(f(4));
        System.out.println(f(5));
    }
    public static int f(int n){
        if(n == 1){
            return 1;
        }else{
            return  f(n-1)  +  n;
        }
    }
}
